Wireless Headphones Bluetooth Headset Noise Cancelling Over Ear With Microphone Specifications: Model:TR905 Bluetooth version: V4.0+EDR Bluetooth operating range : up to 10m (free space) Transmission frequency range: 2.4GHz-2.48GHz Supported profiles: A2DP, AVRCP, HSP, HFP Frequency response: 20Hz-20KHz Standby time: up to 100 hours Bluetooth music/call time: up to 5 hours Fully charged time: about 1-2 hours Operating environment: -10 to 50 Charging voltage/current: DC 5V Battery Capacility: 230mAH Feature: 1.Wear comfortable and secure. This headset earpad is equiped with soft PU skin materials over the ear, feel lightweight and contribute to your ear protection, the headset shell is designed with ABS materials and very durable not to wear out easily. 2.Clear conversation and noise reduction Due to completely covered by the earpad, no outside noise could enter into your ear, nor sound loss. Your ear is only full of the immersive song/ incoming call when heard/ be heard, not disturb and could enjoy your songs/call all days. 3.Fold and adjustable design Redesigned to adjust headset angle to fit your headband size, and foldable to take out any where you want, very convenient to go out travel, exersices, hiking, joging, yoging etc. 4.Universal devices compatible Only have bluetooth enabled devices, this headset could compatible with your PC, smart phone, tablet, speakers. with advanced chip update, no sound loss when connect successfully, feel the sound stream over your ears. 5.Ultimate Music Freedom Support voice command. Answer/ hang-up calls through one-touch controls button. Double-click the button to switch another son. insert your SD card as alternatively, or connect your PC by the packed cable to enjoy your time, battery capacity also show in your smart phone to remind you timely. Package include: 1x Bluetooth Headphone 1x Micro USB charging cable 1x User manual